US11661311B2 - Elevator system - Google Patents

Elevator system Download PDF

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Publication number
US11661311B2
US11661311B2 US16/584,294 US201916584294A US11661311B2 US 11661311 B2 US11661311 B2 US 11661311B2 US 201916584294 A US201916584294 A US 201916584294A US 11661311 B2 US11661311 B2 US 11661311B2
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Prior art keywords
elevator system
passengers
landing
elevator
sensor
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US16/584,294
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US20200102187A1 (en
Inventor
Derk Pahlke
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Otis Elevator Co
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Otis Elevator Co
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Assigned to OTIS ELEVATOR COMPANY reassignment OTIS ELEVATOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OTIS GMBH & CO. OHG
Assigned to OTIS GMBH & CO. OHG reassignment OTIS GMBH & CO. OHG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Pahlke, Derk
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/2408—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration where the allocation of a call to an elevator car is of importance, i.e. by means of a supervisory or group controller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3476—Load weighing or car passenger counting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/46—Adaptations of switches or switchgear
    • B66B1/468—Call registering systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0012—Devices monitoring the users of the elevator system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B2201/00—Aspects of control systems of elevators
    • B66B2201/10—Details with respect to the type of call input
    • B66B2201/103—Destination call input before entering the elevator car
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B2201/00—Aspects of control systems of elevators
    • B66B2201/40—Details of the change of control mode
    • B66B2201/46—Switches or switchgear
    • B66B2201/4607—Call registering systems
    • B66B2201/4615—Wherein the destination is registered before boarding

Definitions

  • the invention relates to an elevator system, in particular to an elevator system comprising at least one passenger sensor provided at least one of its landings.
  • An elevator system typically comprises at least one elevator car moving between a plurality of landings and landing control panels allowing passengers to enter their hall calls or destination calls for using the elevator system.
  • the landing control panels may be destination control panels inviting the passengers to enter their desired destination landing in order to allow the elevator system to optimize the transportation of the passengers, in particular if the elevator system comprises a plurality of elevator cars.
  • An optimized control in particular may include sending an elevator car having enough free space for accommodating all members of the group to the respective landing.
  • Exemplary embodiments of the invention include an elevator system comprising an elevator car configured for traveling along a hoistway between a plurality of landings and at least one passenger sensor provided at least one of the landings.
  • the at least one passenger sensor is configured for detecting passengers, i.e. one or more passengers, which are present within a detection zone defined at the respective landing, by detecting a detection signal reflected by a reflecting building structure at the respective landing.
  • the at least one passenger sensor is further configured for providing a sensor signal related to the detected passengers.
  • a sensor configured for providing a signal which is correlated with the number of passengers, i.e. a signal providing a measure of the number of passengers, at a landing can conveniently be arranged in or at an input terminal (“destination entry kiosks”) housing the respective landing control panel. It in particular is not necessary to modify the building structure for installing the sensor.
  • Exemplary embodiments of the invention further include a method of controlling an elevator system according to an exemplary embodiment of the invention, wherein the method includes controlling the movement of the at least one elevator car based on the sensor signal(s) provided by the at least one passenger sensor.
  • the elevator control may employ a certain buffer between the number of passengers assigned to an elevator car and the actual maximum load of the elevator car in order to avoid an overload in case not all passengers associated with a destination call are detected by the at least one passenger sensor.
  • the reflecting building structure may be located in an upper part of the respective landing.
  • the reflecting building structure in particular may include a ceiling or a portion of a ceiling of the respective landing.
  • a reflector may be provided at the ceiling of the respective landing.
  • Using the ceiling of the landing for reflecting the signals allows for an easy implementation at low costs.
  • Using a dedicated reflector might enhance the quality and/or intensity of the reflection. This might enhance the reliability of the detection and/or allow using cheaper passenger sensors with reduced sensitivity.
  • the at least one passenger sensor may be configured for providing a signal which is correlated with the number of passengers present within the predefined detection zone.
  • the at least one passenger sensor may be configured for providing a signal which is a measure of the number of passengers present within the predefined detection zone.
  • the predefined detection zone may be located close to the landing control panel at the respective landing in order to identify and count only passengers related to a control command (destination call) currently input via the landing control panel.
  • the at least one passenger sensor may comprise at least one detector (passive device) which is configured for detecting radiation emitted by the passengers and being reflected by the reflecting building structure. Detecting radiation, such as heat or noise, emitted by the passengers allows for a low cost implementation, as there is no need of providing an emitter for emitting radiation which is to be reflected by the passengers.
  • the at least one passenger sensor may comprise at least one emitter (active device) configured for emitting a detection signal to be reflected by the reflecting building structure towards the predefined detection zone, and at least one detector configured for detecting a detection signal reflected from at least one of the passengers within the predefined detection zone via the reflecting building structure towards the detector.
  • the emitter may be configured for emitting the radiation towards the reflecting building structure within a well-defined opening angle centered around a defined emission direction.
  • an emitter allows using a detection signal comprising radiation which is not emitted by the passengers themselves.
  • signals in a selected frequency range which allows for a very reliable detection of the passengers, may be used.
  • the detection signal may include electromagnetic radiation, such as visible light, infrared light and/or millimeter waves.
  • the sensor signal also may include sound, such as ultrasound.
  • the at least one emitter and/or the at least one detector may be arranged at or in an input terminal, such as a destination entry kiosk, located at the respective landing and housing the respective landing control panel.
  • the at least one emitter and/or the at least one detector in particular may be arranged at or in the same input terminal.
  • the at least one emitter and/or the at least one detector may have an opening angle, i.e. an angle in which the detection signal is emitted and/or received, which is in the range of 30° to 60°, in particular an opening angle of 45°.
  • an opening angle i.e. an angle in which the detection signal is emitted and/or received
  • the size of the detection zone may be adjusted.
  • the size of the detection zone in particular may be adjusted in order to detect substantially all passengers belonging to a group of passengers entering a destination call without detecting additional passengers, which are not part of said group.
  • the elevator system may comprise a controller, in particular a controller which is configured for destination dispatching.
  • a controller which is configured for destination dispatching.
  • passengers enter their desired destinations via the landing control panels before entering an elevator car.
  • the controller then assigns each passenger or each group of passengers to a dedicated elevator car in order to optimize the transport capacity and the transport speed of the elevator system.
  • passengers with the same destination may be assigned to the same elevator car for reducing the total number of stops of the elevator cars.
  • a method of controlling an elevator system in particular may include receiving a destination call at one of the landings; determining a measure of the number of passengers being present within the predefined detection zone at the respective landing from a sensor signal provided by a passenger sensor located at said landing; and controlling the movement of the at least one elevator car based on the received destination call and the determined measure of the number of passengers.
  • Destination dispatching using a sensor signal indicating a measure of the number of passengers associated with a currently entered destination call allows for a very efficient control of the elevator system; it in particular allows for an efficient dispatching of the elevator car(s) in response to hall calls or destination calls.
  • FIG. 1 schematically depicts an elevator system to which an exemplary embodiment of the present invention may be applied.
  • FIG. 2 shows a schematic side view of a landing of an elevator system in which an exemplary embodiment of the present invention is employed.
  • FIG. 3 shows a schematic side view of a landing of an elevator system in which another exemplary embodiment of the present invention is employed.
  • FIG. 1 schematically depicts an elevator system 2 to which an exemplary embodiment of the present invention may be applied.
  • the elevator system 2 includes an elevator car 10 movably arranged within a hoistway 4 extending between a plurality of landings 8 .
  • the elevator car 10 in particular is movable along a plurality of car guide members 14 , such as guide rails, extending along the vertical direction of the hoistway 4 . Only one of said car guide members 14 is visible in FIG. 1 .
  • elevator car 10 Although only one elevator car 10 is depicted in FIG. 1 , the skilled person will understand that exemplary embodiments of the invention may include elevator systems 2 having a plurality of elevator cars 10 moving in one or more hoistways 4 .
  • the elevator car 10 is movably suspended by means of a tension member 3 .
  • the tension member 3 for example a rope or belt, is connected to a drive unit 5 , which is configured for driving the tension member 3 in order to move the elevator car 10 along the height of the hoistway 4 between the plurality of landings 8 , which are located on different floors.
  • Each landing 8 is provided with a landing door 11
  • the elevator car 10 is provided with a corresponding elevator car door 12 for allowing passengers to transfer between a landing 8 and the interior of the elevator car 10 when the elevator car 10 is positioned at the respective landing 8 .
  • the exemplary embodiment of the elevator system 2 shown in FIG. 1 employs a 1:1 roping for suspending the elevator car 10 .
  • the skilled person easily understands that the type of the roping is not essential for the invention and that different kinds of roping, e.g. a 2:1 roping, may be used as well.
  • the elevator system 2 may have a machine room or may be a machine room-less elevator system.
  • the elevator system 2 may use a tension member 3 , as it is shown in FIG. 1 , or it may be an elevator system without a tension member 3 .
  • the drive 5 may be any form of drive used in the art, e.g. a traction drive, a hydraulic drive or a linear drive.
  • the elevator system 2 shown in FIG. 1 further includes a counterweight 19 attached to the tension member 3 and moving concurrently and in opposite direction with respect to the elevator car 10 along at least one counterweight guide member 15 .
  • a counterweight 19 attached to the tension member 3 and moving concurrently and in opposite direction with respect to the elevator car 10 along at least one counterweight guide member 15 .
  • the skilled person will understand that the invention may be applied also to elevator systems 2 which do not comprise a counterweight 19 .
  • the tension member 3 may be a rope, e.g. a steel wire rope, or a belt.
  • the tension member 3 may be uncoated or may have a coating, e.g. in the form of a polymer jacket.
  • the tension member 3 may be a belt comprising a plurality of polymer coated steel cords (not shown).
  • the elevator system 2 may have a traction drive including a traction sheave for driving the tension member 3 .
  • the drive unit 5 is controlled by a controller 6 for moving the elevator car 10 along the hoistway 4 between the different landings 8 .
  • Input to the controller 6 may be provided via landing control panels 7 a , which are provided on each landing 8 close to the landing doors 11 , and/or via an elevator car control panel 7 b , which is provided inside the elevator car 10 .
  • the controller 6 in particular may be configured for destination dispatching.
  • destination dispatching When destination dispatching is applied, passengers 26 enter their desired destinations via the landing control panels 7 a before entering an elevator car 10 .
  • the controller 6 than assigns each passenger 26 to a dedicated elevator car 10 for optimizing the transport capacity and the transport speed of the elevator system 2 .
  • passengers 26 with the same destination may be assigned to the same elevator car 10 for reducing the total number of stops of the elevator cars 10 .
  • usually no elevator car control panel 7 b is used.
  • Each of the landing control panels 7 a may be mounted to a wall 32 at the respective landing 8 .
  • the landing control panels 7 a may be located in input terminals 34 (see FIG. 3 ) arranged in the vicinity of the respective landing doors 11 .
  • the input terminals 34 in particular may be freestanding destination entry kiosks arranged in front of the landing doors 11 .
  • the landing control panels 7 a and the elevator car control panel 7 b may be connected to the controller 6 by means of electric wires, which are not shown in FIG. 1 , in particular by an electric bus, such as a field bus/CAN-bus, or by means of wireless data connections.
  • an electric bus such as a field bus/CAN-bus
  • FIGS. 2 and 3 respectively depict a schematic side view of a landing 8 of an elevator system 2 in which an embodiment of the present invention is employed.
  • the landing 8 may be any landing 8 of the elevator system 2 .
  • the landing 8 in particular may be a landing 8 located in the lobby of the building housing the elevator system 2 , or any other landing 8 for which a large passenger traffic is expected.
  • At least one passenger sensor 20 is provided at the landing 8 .
  • the at least one passenger sensor is configured for detecting passengers 26 which are present within a detection zone 28 defined at the landing 8 by detecting a detection signal 30 b reflected by a reflecting building structure 22 , 24 , such as a ceiling 22 of the landing 8 .
  • the at least one passenger sensor 20 in particular is configured for providing a sensor signal which is a measure of the number of passengers 26 detected within the detection zone 28 .
  • the reflecting building structure 22 , 24 may include a reflector 24 and/or a reflective coating, in order to enhance the reflection properties of the reflecting building structure 22 , 24 .
  • Using a reflected detection signal 30 b for detecting the passengers 26 reduces or minimizes the risk of generating a wrong sensor signal because passengers 26 are not detected since they are shadowed by other passengers 26 so that the detection signal 30 b is blocked.
  • the elevator system 2 may be controlled based on the number of detected passengers 26 in combination with a destination call entered at the respective landing 8 in order to optimize the transport capacity of the elevator system 2 and the user experience of the passengers 26 .
  • only elevator cars 10 having enough free space for accommodating the whole group of passengers 26 standing within the detection zone 28 may stop at the landing 8 in order to avoid that the passengers 26 need to separate for entering different elevator cars 10 .
  • the at least one passenger sensor 20 may be mounted to a wall 32 at the landing 8 , as shown in FIG. 2 .
  • the at least one passenger sensor 20 may be located at or within an input terminal 34 , which comprises the landing control panel 7 and is arranged at the landing 8 in the vicinity of the landing door 11 , as it is shown in FIG. 3 .
  • the at least one passenger sensor 20 may comprise at least one detector 36 configured for detecting radiation such as heat or noise emitted by the passengers 26 and being reflected by the structural component 22 or the reflector 24 .
  • the at least one passenger sensor 20 may further comprise at least one emitter 38 configured for emitting a detection signal 30 a to be reflected by the reflecting building structure 22 , 24 towards the predefined detection zone 28 and the at least one detector 36 may be configured for detecting a detection signal 30 b reflected from at least one of the passengers 26 within the predefined detection zone 28 .
  • the at least one emitter 38 and/or the at least one detector 36 may have an opening angle in the range of 30° to 60°, in particular an opening angle of 45°.
  • the size of the detection zone 28 may be adjusted in order to detect preferably all passengers 26 of a group of passengers 26 entering a destination call without detecting additional passenger 26 which are not part of the group.
  • the detection signal 30 a , 30 b which is emitted by the at least one emitter 38 and/or detected by the at least one detector 36 may include electromagnetic radiation, in particular at least one of visible light, infrared light and millimeter waves.
  • the detection signal 30 a , 30 b emitted by the at least one emitter 38 and/or detected by the at least one detector 36 may also include sound, in particular ultrasound and/or sound generated by the passengers 26 within the detection zone 28 .

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mechanical Engineering (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
US16/584,294 2018-09-27 2019-09-26 Elevator system Active 2042-02-03 US11661311B2 (en)

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EP18197166.4 2018-09-27
EP18197166 2018-09-27
EP18197166.4A EP3628620B1 (en) 2018-09-27 2018-09-27 Elevator system

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US11661311B2 true US11661311B2 (en) 2023-05-30

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